UM1350_14 Datasheet, PDF (7/15 Pages) Union Semiconductor, Inc. – 350mA, LED Lighting Driver

Typical Operating Characteristics
(V_IN=12V, T_A=25℃, unless otherwise noted)
Efficiency vs.Vin (Rs=0.33Ω,L=47uH)
100
90
80
70
1LED
2LED
3LED
4LED
60
5LED
6LED
7LED
8LED
50
0
5
10
15
20
25
30
Vin (V)
Efficiency vs.Vin (Rs=0.33Ω,L=220uH)
100
90
80
70
1LED
2LED
3LED
4LED
60
5LED
6LED
7LED
8LED
50
0
5
10
15
20
25
30
Vin (V)
100.0
Duty Cycle vs. Vin (Rs=0.33Ω,L=100uH)
80.0
60.0
40.0
1LED
2LED
20.0
3LED
4LED
5LED
6LED
7LED
8LED
0.0
5
10
15 _Vin(V) 20
25
30
UM1350
Efficiency vs.Vin (Rs=0.33Ω,L=100uH)
100
90
80
70
1LED
2LED
3LED
4LED
60
5LED
6LED
7LED
8LED
50
0
5
10
15
20
25
30
Vin (V)
100.0
Duty Cycle vs. Vin (Rs=0.33Ω,L=47uH)
80.0
60.0
40.0
1LED
2LED
20.0
3LED
4LED
5LED
6LED
7LED
8LED
0.0
5
10
15
20
25
30
Vin(V)
100.0
Duty Cycle vs. Vin (Rs=0.33Ω,L=220uH)
80.0
60.0
40.0
1LED
2LED
20.0
3LED
4LED
5LED
6LED
7LED
8LED
0.0
5
10
15
20
25
30
Vin(V)
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http://www.union-ic.com Rev.03 Nov.2014
7/15